RADNOR, Pennsylvania -- Complicated coifs just won't cut it on "Sex and the City."

Sarah Jessica Parker says she and other actresses on the Manhattan-based HBO series have to sport hairstyles that normal women can wear. They are, after all, regular gals.

"The hair rules are, if you can't do it yourself, you can't do it," she told TV Guide. "I don't know any woman in America who can run out of the house in the morning and do an upsweep - except for maybe Ivana Trump, and I don't want anyone on the show to look like Ivana Trump."

On the list of hair 'don'ts': scrunchies, butterfly clips or 'hair ornaments of any kind.'